9 Pieces of 7 More diamond more long lasting honeycomb Polishing Pad for granite marble concrete glass quartz. 1 Piece of FREE GIFT 7 Rubber Backer/Pad Holder. (5/8-11 Female Thread arbor). Remind: Rubber Backer’s max velocity capacity is 5000RPM, please don’t use it with high speed grinder/polisher. 9 Pieces of 7 Diamond Polishing Pad for granite marble concrete stone. 3 X Grit 30. 2 X Grit 50 100. 1 X Grit 400 1500. 1 Piece of 7″ (5/8″-11 Female Thread arbor) FREE GIFT Rubber Backer/Pad Holder. Remind: Rubber Backer’s max velocity / capacity is 5000RPM, please don’t use it with high speed grinder/polisher. Recommend 3500 – 5000 rpm. Wet or dry use (wet use recommended).